Steam locomotive



Oct. 30, 1945.

G. A. svlLvERsPARRE STEAM LOCOMOTIVE Filed D ec. 27, 1943 ma L I ATTO fEYS.

Patented Oct. 3 0, 1945 STEAM LOC'OMOTIVE Gustav Arent Silversparre, Narbeth, Pa., assignor to The Pennsylvania Railroad Company, Philadelphia, Pa., a corporation of Pennsylvania Application December 27, 1943, Serial No. 515,657

3 Claims.

`This invention relates to steam locomotives of the type having rigid wheelbases as distinguished from articulated locomotives of the Mallett type.

In rigid Wheelbase locomotives as ordinarily constructed power is transmitted to plural drivers on a rigid wheelbase from a single pair of cylinders at the front ends of the locomotives.

The chief aims of my invention are to increase the pulling capacity of rigid wheelbase locomotives through application of power to different sets f drivers at opposite sides thereof from additional cylinders, and to provide for the support of the additional cylinders in such manner as to allow close spacing of contiguous drivers of the different sets and thus keep the overall wheelbase dimension of the locomotives restricted to limits prescribed by standard'track curvatures.

Other objects and attendant advantages will appear from the following description of the attached drawing, wherein Fig. 1 is a side elevation of a steam locomotive embodying my invention; and wherein Fig. 2 is a fragmentary horizontal detail sectional view drawn to a largerscale and taken as indicated by the angled arrows II-II in Fig. l.

The steam locomotive illustrated in Fig. 1 for convenience of exemplication herein, has a boiler 5 which may be of any approved construcsaid frame. It is to be particularly noted from Fig. 2 that the longitudinal dimension of the projections I8 is -made considerably less than the length of the cylinders I'I with resultant provision, between the frame sides and the opposite ends of said cylinders, of clearance spaces into whichthe peripheries of the contiguous drivers II, I2 of the two sets B, 9 extend. This construction thus permits much closer spacing of the drivers I I, I2 than would otherwise be possible to the advantage of minimizing the: overall rigid wheelbase of the locomotive. At its forward end, each projection I8 is recessed as at I9 to receive the upper end of a brake shoe hanger 20 for the driver II at the corresponding side of the locomotive. The pivot pin 2I for the hanger 20 is inserted through registering bores 22 and 23 respectively in the frame projection I8 and in the wall of the cylinder I'I. The construction of the cylinders I'I may otherwise be conventional and accordingly need not be described in detail herein.

Having thus described my invention, I claim:

1. A steam locomotive having two groups of driving wheels at each side thereof; a journal frame for the axles of the several drivers; and

tion, and which is supported at its front end by a small four-wheeled swivel truck 6, and at its rear end by a small four-wheeled rigid truck l. In the interval between the two trucks 6 and 'I the boiler 5 is supported in this instance by two groups 8, 9 of drivers, each consisting of two pairs of wheels I0, II and I2, I3 which have their axles journaled inAXed bearings provided by the side members of the rigid framework I5 of the locomotive. The forward pair of cylinders I6 serve, through suitable connecting rods (not shown) to actuate the drivers 'I0 and II and may be supported in the usual way directly over the forward swivel truck 6. The rear cylinders I'I are xedly supported by the side members of the rigid frame I5, which, for that purpose are respectively provided with lateral projections such as the one shown at I8 in Fig. 2 extending outward between the contiguous wheels II and I2 of the two driver sets, said projections and cylinders being preferably integrally formed with serially arranged front and rear cylinders for actuating the respective driver groups, each rear cylinder being supported outward of the frame by a lateral projection of which the longitudinal dimension is considerably less than the length of said rear cylinder, with resultant provision of relatively deep clearances for projection thereinto of the peripheries of the contiguous Wheels of the two driver groups at the corresponding side of the locomotive.

2. A steam locomotive according to claim 1, in which the rear cylinder supporting projections have recesses for the reception and pivoting of the upper ends of brake shoe hangers for the aft wheels of the leading driver set.

3. A steam locomotive according to claim 1, in which the rear cylinders and the supporting projections are integrally formed with the frame; and in which said projections have recesses for the reception and pivoting of the upper ends 'of brake shoe hangers for the aft wheels of the leading driver set.

GUSTAV ARENT SILVERSPARRE. 

